My phone is suddenly eating battery like mad. I want to do a restore and setup as new phone. Question: My contacts, calendar, reminders, notes, photo's and music...what will happen? Will it be back on after set up as new phone and then sync with icloud and itunes? Is it good to restore a backup as well? I'm scared that restoring from backup will just restore the problem. The battery drain was always between 8% - 10% per hour and suddenly about 18% - to 20% per hour. And the phone is heating up for the first time I got it...